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Kronberger 61


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About this observation
Peter Goodhew FRAS
Time of observation
05/11/2019 - 17:28
Kronberger 61
Observing location
Fregenal de la Sierra, Spain
APM TMB LZOS 152 Refractor
10Micron GM2000 mount
QSI6120wsg8 camera
23 hours total exposure OIIILRGB

Kronberger 61 (Kn 61). also known as the Soccer Ball nebula, is a recently-discovered planetary nebula in the constellation of Cygnus. It was discovered in January 2011 by Mattias Kronberger, who is a member of the amateur group Deep Sky Hunters. It is very small (diameter of 104 arcsecs).
It is barely visible on the second Palomar Optical Sky Survey (POSS-II) blue plate scan, suggesting a surface brightness well below magnitude 25 per square arcsecond - and at an estimated distance of 13,000 light years (1).
It is a highly filamentary bubble with a high expansion velocity of 67.6 km/second. A crude kinematic age for the bubble yields 16,000 years (2).

Astrodon Blue: 10x300"
Astrodon Green: 10x300"
Astrodon Lum: 19x600"
Astrodon Red: 10x300"
Astrodon OIII: 34x1800s bin 2x2
Total Integration: 23 hours

Captured on my dual rig in Spain.
Scopes: APM TMB LZOS 152 (6" aperture 1200mm focal length)
Cameras: QSI6120wsg8
Mount: 10Micron GM2000 HPS

(1) <a href="" rel="noreferrer nofollow"></a>
(2) <a href="" rel="noreferrer nofollow"></a>

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